Display substrate and display apparatus

Abstract

The present disclosure belongs to the technical field of display. Provided are a display substrate and a display apparatus. The display substrate in the present disclosure comprises a base substrate, and pixel units arranged in an array and arranged on the base substrate, the pixel units comprising first sub-pixels, second sub-pixels and third sub-pixels that respectively emit light of different colors, wherein the first sub-pixels and the third sub-pixels are located in the same row, and in a different row from the second sub-pixels, at least one auxiliary sub-pixel is arranged between the second sub-pixels of the pixel units located in the same row, and the auxiliary sub-pixel and the second sub-pixels emit light of the same color.

Description

Display substrate and display device Technical Field

[0001] The present disclosure belongs to the field of display technology, and particularly relates to a display substrate and a display device. Background Art

[0002] Organic light-emitting diodes (OLEDs) are widely used in various display products due to their self-luminescence, high contrast, and flexibility and foldability. Quantum dots (QDs) offer continuous wavelength tunability with particle size, uniform light output, and spectral purity, enhancing the optical display quality of products. The QD-OLED technology, which combines these two technologies, offers self-luminescence, high contrast, flexibility and foldability, a wide color gamut, and excellent viewing angles.

[0003] Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art and provides a display substrate and a display device.

[0005] An embodiment of the present disclosure provides a display substrate, comprising:

[0006] substrate;

[0007] Pixel units arranged in an array are provided on the substrate; the pixel units include a first sub-pixel, a second sub-pixel, and a third sub-pixel that respectively emit light of different colors, the first sub-pixel and the third sub-pixel are located in the same row, and are located in a different row from the second sub-pixel; wherein,

[0008] At least one auxiliary sub-pixel is arranged between the second sub-pixels of the pixel units located in the same row, and the auxiliary sub-pixel and the second sub-pixel emit light of the same color.

[0009] In which, the display substrate also includes a driving circuit layer located on the side of the base substrate where the light-emitting device is located, and the driving circuit layer includes a first power signal line, and the first power signal line is electrically connected to the second electrode of the light-emitting device through an auxiliary electrode, and the auxiliary electrode is projected on the base substrate between the light-emitting devices of the first sub-pixel and the light-emitting devices of the third sub-pixel that are adjacent to each other in the row direction on the base substrate.

[0010] Wherein, a first interlayer insulating layer is provided between the driving circuit layer and the layer where the first electrode of the light-emitting device is located, and a pixel defining layer is provided on a layer of the first electrode of the light-emitting device away from the base substrate;

[0011] The auxiliary electrode is arranged in the same layer as the first electrode of the light-emitting device, and is connected to the first power signal line through a first via hole penetrating the first interlayer insulating layer; the pixel defining layer has a first through hole corresponding to the position of the auxiliary electrode and penetrating along its thickness direction; the side wall of the first through hole is covered with a protective layer.

[0012] Wherein, an electron conducting layer is provided on the surface of the auxiliary electrode away from the base substrate.

[0013] Wherein, the orthographic projection of the auxiliary electrode on the base substrate is located on both sides of the orthographic projection of the auxiliary electrode on the base substrate, and the first sub-pixel and the third sub-pixel are respectively located in two different pixel units.

[0014] The display substrate further comprises a pixel defining layer provided on the first electrode of the light-emitting device away from the base substrate, wherein the pixel defining layer has a first accommodating portion, a second accommodating portion, a third accommodating portion and an auxiliary accommodating portion penetrating along a thickness direction thereof;

[0015] The light-emitting layer of the light-emitting device in the first sub-pixel covers the first accommodation portion, the light-emitting layer of the light-emitting device in the second sub-pixel covers the second accommodation portion, the light-emitting layer of the light-emitting device in the third sub-pixel covers the third accommodation portion, and the light-emitting layer of the light-emitting device in the auxiliary sub-pixel covers the auxiliary accommodation portion;

[0016] The length of the second accommodation portion in the row direction is g1;

[0017] The minimum distance between the auxiliary accommodating portions, the first accommodating portion in the pixel unit located at the i-th row and j-th column, the second accommodating portion in the pixel unit located at the i-th row and j-th column, and the second accommodating portion in the pixel unit located at the i-th row and (j+1)-th column, is l3;

[0018] The minimum distance between the first accommodating portion in the pixel unit located in the (i+1)th row and jth column, the second accommodating portion in the pixel unit located in the i-th row and jth column, and the second accommodating portion in the pixel unit located in the i-th row and (j+1)th column is l4; i and j are both positive integers; l3≥1 / 6*g1, l4≤1 / 3*g1.

[0019] The display substrate further comprises a pixel defining layer provided on the first electrode of the light-emitting device away from the base substrate, wherein the pixel defining layer has a first accommodating portion, a second accommodating portion, a third accommodating portion and an auxiliary accommodating portion penetrating along a thickness direction thereof;

[0020] The light-emitting layer of the light-emitting device in the first sub-pixel covers the first accommodation portion, the light-emitting layer of the light-emitting device in the second sub-pixel covers the second accommodation portion, the light-emitting layer of the light-emitting device in the third sub-pixel covers the third accommodation portion, and the light-emitting layer of the light-emitting device in the auxiliary sub-pixel covers the auxiliary accommodation portion;

[0021] The length of the second accommodation portion in the row direction is g1;

[0022] A plurality of the auxiliary accommodating portions are arranged between adjacent second accommodating portions, at least some of the plurality of the auxiliary accommodating portions are arranged side by side along the column direction, and the spacing between the auxiliary accommodating portions arranged side by side along the column direction is l5, 1 / 10*g1≤l5≤1 / 6*g1.

[0023] The display substrate further comprises a pixel defining layer provided on the first electrode of the light-emitting device away from the base substrate, wherein the pixel defining layer has a first accommodating portion, a second accommodating portion, a third accommodating portion and an auxiliary accommodating portion penetrating along a thickness direction thereof;

[0024] The light-emitting layer of the light-emitting device in the first sub-pixel covers the first accommodation portion, the light-emitting layer of the light-emitting device in the second sub-pixel covers the second accommodation portion, the light-emitting layer of the light-emitting device in the third sub-pixel covers the third accommodation portion, and the light-emitting layer of the light-emitting device in the auxiliary sub-pixel covers the auxiliary accommodation portion;

[0025] The length of the second accommodation portion in the row direction is g1;

[0026] For two second-accommodation portions arranged adjacent to each other in the row direction, and each auxiliary accommodation portion located between the two, the minimum distance between one of the second-accommodation portions and the auxiliary accommodation portion is d1, and the minimum distance between the other second-accommodation portion and the auxiliary accommodation portion is d2, d1≥1 / 10*g1, d2≤1 / 5*g1.

[0027] The display substrate further comprises a pixel defining layer provided on the first electrode of the light-emitting device away from the base substrate, wherein the pixel defining layer has a first accommodating portion, a second accommodating portion, a third accommodating portion and an auxiliary accommodating portion penetrating along a thickness direction thereof;

[0028] The light-emitting layer of the light-emitting device in the first sub-pixel covers the first accommodation portion, the light-emitting layer of the light-emitting device in the second sub-pixel covers the second accommodation portion, the light-emitting layer of the light-emitting device in the third sub-pixel covers the third accommodation portion, and the light-emitting layer of the light-emitting device in the auxiliary sub-pixel covers the auxiliary accommodation portion;

[0029] The length of the second accommodation portion in the row direction is g1;

[0030] A plurality of the auxiliary accommodating parts are arranged between adjacent second accommodating parts, at least some of the plurality of the auxiliary accommodating parts are arranged side by side along the row direction, and the spacing between the auxiliary accommodating parts arranged side by side along the row direction is d3, 1 / 10*g1≤d3≤1 / 6*g1.

[0031] Wherein, only one auxiliary sub-pixel is arranged between the second sub-pixels adjacent to each other in the row direction, and the aperture ratio ratio of the auxiliary sub-pixel to the second sub-pixel is 0.5-10.

[0032] Among them, a plurality of the auxiliary sub-pixels arranged side by side along the row direction between the second sub-pixels adjacent to each other in the row direction have an aperture ratio ratio of the auxiliary sub-pixels to the second sub-pixels of 0.1 to 0.6.

[0033] Among them, a plurality of the auxiliary sub-pixels are arranged side by side in the column direction between the second sub-pixels adjacent to each other in the row direction, and an aperture ratio ratio of the auxiliary sub-pixels to the second sub-pixels is 0.1 to 0.6.

[0034] Among them, a plurality of the auxiliary sub-pixels are arranged between the second sub-pixels adjacent to each other in the row direction, and some of the plurality of auxiliary sub-pixels are arranged side by side along the row direction, and some are arranged side by side along the column direction; the aperture ratio ratio of the auxiliary sub-pixels to the second sub-pixels is 0.05 to 0.4.

[0035] There are multiple auxiliary sub-pixels between the second sub-pixels adjacent to each other in the row direction, and at least some of the auxiliary sub-pixels have different aperture ratios.

[0036] Among the plurality of the auxiliary sub-pixels between the second sub-pixels adjacently arranged in the row direction, a ratio of the one with the largest aperture ratio to the one with the smallest aperture ratio is 1.5-4.

[0037] The first sub-pixel, the second sub-pixel, the third sub-pixel and the auxiliary sub-pixel all include a light-emitting device that emits light of a third color; the first sub-pixel also includes a first quantum dot unit located on the light-emitting surface side of the light-emitting device, the second sub-pixel also includes a second quantum dot unit located on the light-emitting surface side of the light-emitting device, and the auxiliary sub-pixel also includes an auxiliary quantum dot unit located on the light-emitting surface side of the light-emitting device;

[0038] The first quantum dot unit is configured to emit first color light under the excitation of third color light, and the second quantum dot unit and the auxiliary quantum dot unit are both configured to emit second color light under the excitation of third color light.

[0039] The material of the auxiliary quantum dot unit is different from the material of the second quantum dot unit.

[0040] The material of the auxiliary quantum unit and the material of the second auxiliary quantum dot unit contain quantum dots of the same type but with different distribution densities; and / or the material of the auxiliary quantum unit and the material of the second auxiliary quantum dot unit contain quantum dots of the same type but with different particle sizes.

[0041] The material of the auxiliary quantum unit and the material of the second auxiliary quantum dot unit contain quantum dots of different types.

[0042] An embodiment of the present disclosure further provides a display device, which includes any of the display substrates described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] FIG1 is a top view of an exemplary display substrate.

[0044] FIG. 2 is a cross-sectional view of an exemplary display substrate.

[0045] FIG3 is a top view of a display substrate according to a first example of an embodiment of the present disclosure.

[0046] FIG. 4 is a cross-sectional view of a display substrate according to an embodiment of the present disclosure.

[0047] FIG5 is a process flow chart of punching holes in a display substrate to form auxiliary electrodes according to an embodiment of the present disclosure.

[0048] FIG. 6 is a partially enlarged view of the position of the auxiliary electrode of the display substrate according to an embodiment of the present disclosure.

[0049] FIG7 a is a partial cross-sectional schematic diagram of a first exemplary display substrate according to an embodiment of the present disclosure.

[0050] FIG7 b is a partial cross-sectional schematic diagram of a display substrate according to a first example of an embodiment of the present disclosure.

[0051] Figure 8a is a spectrum diagram of different quantum dot material systems.

[0052] Figure 8b shows the absorption diagrams of different quantum dot material systems.

[0053] FIG. 9 is a top view of a second exemplary display substrate according to an embodiment of the present disclosure.

[0054] FIG. 10 is a top view of a display substrate according to a third example of an embodiment of the present disclosure.

[0055] FIG. 11 is a top view of a display substrate according to a fourth example of an embodiment of the present disclosure.

[0056] FIG. 12 is a top view of a display substrate according to a fifth example of an embodiment of the present disclosure.

[0057] FIG. 13 is a top view of a display substrate according to a sixth example of an embodiment of the present disclosure.

[0058] FIG. 14 is a top view of a display substrate according to a seventh example of an embodiment of the present disclosure.

[0059] FIG. 15 is a top view of an eighth example of a display substrate according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0060] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0061] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by people with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0062] Before describing the embodiments of the present disclosure, it should be noted that in the embodiments of the present disclosure, only the first sub-pixel is a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel is taken as an example. The first color light emitted by the corresponding first sub-pixel is red light, the second color light emitted by the second sub-pixel is green light, and the third color light emitted by the third sub-pixel is blue light. As for the auxiliary sub-pixel and the second sub-pixel emitting light of the same color, that is, the light emitted by the auxiliary sub-pixel is green light. The corresponding first quantum dot unit is a red quantum dot unit, and the second quantum dot unit is a green quantum dot unit; the red quantum dot unit can emit red light under the excitation of blue light, and the green quantum dot unit and the auxiliary quantum dot unit can emit green light under the excitation of blue light. In the embodiments of the present disclosure, the first electrode of the light-emitting device is taken as an anode, and the second electrode is taken as a cathode.

[0063] Figure 1 is a top view of an exemplary display substrate; as shown in Figure 1, the display substrate includes a base substrate 10, and pixel units 100 arranged in an array on the base substrate 10, each pixel unit 100 includes three sub-pixels, namely a red sub-pixel R, a green sub-pixel G and a blue sub-pixel B. The red sub-pixel R and the blue sub-pixel B in each pixel unit 100 are located in the same row, and are located in a different row from the green sub-pixel G.

[0064] Specifically, the display substrate includes at least a driving circuit layer and a light-emitting device layer sequentially located on the base substrate 10. The driving circuit layer includes a pixel driving circuit in each sub-pixel and a signal line electrically connected to the pixel driving circuit; the light-emitting device layer includes a light-emitting device in each sub-pixel. The pixel driving circuit is composed of electrical components such as thin-film transistors and storage capacitors. The light-emitting device can be an OLED, and the anode of the light-emitting device is electrically connected to the pixel driving circuit. Of course, the display substrate can also include a quantum dot layer located on the light-emitting surface side of the light-emitting device, and the quantum dot layer includes a red quantum dot unit located in the red sub-pixel R and a green quantum dot unit located in the green sub-pixel G. When the display substrate includes a quantum dot layer, each light-emitting device is a blue light-emitting device that emits blue light.

[0065] Next, the structure of each film layer in the display substrate will be described in detail. FIG2 is a cross-sectional view of an exemplary display substrate. As shown in FIG2 , the display substrate comprises, from bottom to top: a base substrate 10, made of polyimide with a film thickness range of 1 to 5 μm; a barrier layer, made of SiO2 with a film thickness range of 100 to 800 nm; a back shield mask (BSM), made of a metal material such as chromium, nickel, manganese, molybdenum, vanadium, manganese, etc., with a film thickness range of 200 to 1000 nm; and a layer where the first power signal line ELVSS and the second power signal line ELVDD are located, made of a metal material such as aluminum, copper, tungsten, titanium, molybdenum, gold, etc., with a film thickness range of 100 to 600 nm; a buffer layer, made of SiOx, SiNOx, SiNx, etc., with a film thickness range of 200 to 800 nm; an active layer of the thin film transistor, made of a metal oxide, amorphous silicon, polycrystalline silicon, etc.; and a gate insulating layer (GI). Insulator), made of SiOx, SiNOx, SiNx, etc., with a film thickness range of 100 to 400nm; gate metal layer, including at least the gate and gate line of the thin film transistor, made of copper, molybdenum, tungsten, titanium, etc., with a film thickness range of 200 to 1000nm; interlayer insulating layer (Inner layer Dielectric layer), made of SiNOx, SiNx, etc., with a film thickness range of 500 to 2000nm; source and drain electrode layer (SD; Source and drain), including at least the source and drain of the thin film transistor, data line, etc., made of copper, molybdenum, tungsten, titanium, etc., with a film thickness range of 100 to 400nm; passivation layer (PVX; passivation layer The following are the main components: a planarization layer (PLN) made of SiOx, SiNOx, SiNx, etc., with a thickness range of 200 to 600 nm; a planarization layer (PLN) made of polyimide with a thickness range of 1 to 5 μm; an anode layer (Anode) of the light-emitting device made of metals such as Ag, Mg, Al, Pt, Au, Ni, Nd, or metal oxides such as ITO, IGO, ITZO, and IGZOd, with a thickness range of 100 to 200 nm; and a pixel definition layer (PDL) made of polyimide with a thickness range of 1 to 3 μm. Of course, the light-emitting layer and cathode layer of the light-emitting device are also provided above the pixel definition layer, which are not shown in the accompanying drawings. Furthermore, in order to reduce the cathode resistance of the light-emitting device, a via hole is formed between two green sub-pixels G, penetrating the interlayer insulating layer, the passivation layer, the planarization layer and the pixel definition, by means including but not limited to laser drilling, so that the cathode of the light-emitting device is electrically connected to the first power signal line ELVSS through the auxiliary electrode AE ​​arranged on the same layer as its anode.This method can effectively reduce the resistivity of the film, reduce the surface resistance, reduce the current, and improve the uniformity of the product. It should be noted that the auxiliary electrode AE ​​can be electrically connected to the first power signal line ELVSS through a transfer electrode, and the transfer electrode can be located in the source and drain metal layer SD.

[0066] In addition, it should be noted that the pixel defining layer has a first accommodating portion, a second accommodating portion, and a third accommodating portion extending through the pixel defining layer along its thickness direction. The light-emitting layer of the light-emitting device in the red sub-pixel R at least covers the first accommodating portion, the light-emitting layer of the light-emitting device in the green sub-pixel G at least covers the second accommodating portion, and the light-emitting layer of the light-emitting device in the blue sub-pixel B at least covers the third accommodating portion. The opening sizes of the first accommodating portion, the second accommodating portion, and the third accommodating portion respectively determine the aperture ratios of the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B. In the embodiment of the present disclosure, the distance between the accommodating portions refers to the distance between the orthographic projections of the accommodating portions on the base substrate 10, and the distance between sub-pixels also refers to the distance between the orthographic projections of the accommodating portions on the base substrate 10.

[0067] Continuing with FIG1 , in each row of pixel units 100, the blue sub-pixels B and red sub-pixels R are arranged side by side and alternately in the row direction X. The distance between the blue sub-pixels B and red sub-pixels R in each pixel unit 100 is n; the distance between a red sub-pixel R in each pixel unit 100 and a blue sub-pixel B in an adjacent pixel unit 100 located in the same row is o; the distance between two blue sub-pixels B in adjacent pixel units 100 located in the same column is h; and the distance between two red sub-pixels R in adjacent pixel units 100 located in the same column is l. The ends of the green sub-pixels G in pixel units 100 located in the same row, facing away from the red sub-pixels R, are located on the same horizontal line, and the distance between adjacent green sub-pixels G is d; the distance between green sub-pixels G in pixel units 100 located in the same column is m. The minimum distances between each green subpixel G and the blue subpixel B and red subpixel R in the same pixel unit 100 are h1 and l1, respectively. The minimum distances between each green subpixel G and the blue subpixel B and red subpixel R in the same column and adjacent pixel units 100 are h2 and l2, respectively. The red subpixel R, green subpixel G, and blue subpixel B are all quadrilaterals, meaning that the openings of their respective receiving portions are all quadrilaterals. The opening ratio of the green subpixel G, red subpixel R, and blue subpixel B is x1, where x1 satisfies 1.6:1.4:1≤x1≤1.8:1.2:1. The lengths of the green subpixel G, red subpixel R, and blue subpixel B in the Y direction and the widths in the column direction Y are g1, g2, r1, r2, b1, and b2, respectively, where 50 nm ≤ g1, g2 ≤ 200 nm, 50 nm ≤ r1, r2 ≤ 150 nm, and 20 nm ≤ b1, b2 ≤ 100 nm. The size of each subpixel satisfies the following conditions: 50nm≤g1, g2≤200nm, 50nm≤r1, r2≤150nm, 20nm≤b1, b2≤100nm. The spacing between subpixels satisfies the following conditions: 1 / 4*b1≤n, o≤r1, n and o can be equal or unequal, 1 / 2*g1≤d≤5 / 2*g1, 2*r1≤l≤4*r1, 3*b1≤h≤6*b1, g1≤m≤2*g1, 1 / 10*g1≤h1, l1≤1 / 3*g1, h1 and l1 can be equal or unequal; 1 / 10*g1≤h2, l2≤1 / 2*g1, h2 and l2 can be equal or unequal. The auxiliary electrode AE ​​is located at the center of the two green subpixels G, i.e., at positions l / 2 and d / 2.

[0068] On the basis of the above-mentioned display substrate, in order to optimize the performance of the display substrate, at least one auxiliary sub-pixel is set between adjacent green sub-pixels, and the auxiliary sub-pixel is configured to emit green light. By setting an auxiliary sub-pixel that emits green light and controlling the auxiliary sub-pixel to emit light, the performance of the display substrate is improved. For example: controlling the auxiliary sub-pixel and the green sub-pixel to emit light at the same time improves the overall brightness and efficiency of the device. In order to reduce the power consumption of the product, the auxiliary sub-pixel can also be controlled to emit light after the green light-emitting device has been emitting light for a certain period of time. For example, the auxiliary sub-pixel is controlled to emit light after the brightness of the green sub-pixel decays to 80% of the initial value, so as to increase the life of the product.

[0069] In some examples, the number of auxiliary sub-pixels between the green sub-pixels may be only one or more. When the number of auxiliary sub-pixels is more than one, the multiple auxiliary sub-pixels may be arranged side by side along the row direction X, or may be arranged side by side along the column direction Y, or may include auxiliary sub-pixels arranged side by side along the row direction X and the column direction Y.

[0070] In which, regardless of whether the number of auxiliary sub-pixels is one or more, when auxiliary sub-pixels are included, the pixel defining layer of the display substrate must be provided with an auxiliary accommodating portion for accommodating the light-emitting layer of the light-emitting device of the auxiliary sub-pixel, and the length of the second accommodating portion in the row direction X is g1; the minimum distance between the first accommodating portion in the pixel unit located in the i-th row and j-th column, the second accommodating portion in the pixel unit located in the i-th row and j-th column, and the second accommodating portion in the pixel unit located in the i-th row and (j+1)-th column is l3; the minimum distance between the first accommodating portion in the pixel unit located in the (i+1)-th row and j-th column, the second accommodating portion in the pixel unit located in the i-th row and j-th column, and the second accommodating portion in the pixel unit located in the i-th row and (j+1)-th column is l4; i and j are both positive integers; l3≥1 / 6*g1, l4≤1 / 3*g1. Furthermore, when multiple auxiliary accommodating portions are arranged between adjacent second accommodating portions, at least some of the multiple auxiliary accommodating portions are arranged side by side along the column direction Y, and the spacing between the auxiliary accommodating portions arranged side by side along the column direction Y is l5, 1 / 10*g1≤l5≤1 / 6*g1.

[0071] For two second accommodating sections adjacent to each other in the row direction X, and each auxiliary accommodating section located therebetween, the minimum distance between one second accommodating section and the auxiliary accommodating section is d1, and the minimum distance between the other second accommodating section and the auxiliary accommodating section is d2, where d1 ≥ 1 / 10*g1 and d2 ≤ 1 / 5*g1. Furthermore, multiple auxiliary accommodating sections are provided between adjacent second accommodating sections, at least some of which are arranged side by side in the row direction X, and the spacing between the auxiliary accommodating sections arranged side by side in the row direction X is d3, where 1 / 10*g1 ≤ d3 ≤ 1 / 6*g1.

[0072] The following describes this with reference to specific examples.

[0073] Example 1: Figure 3 is a top view of a display substrate according to the first example of the presently disclosed embodiment. As shown in Figure 3 , in this example, only one auxiliary sub-pixel G' is disposed between adjacent green sub-pixels G in the row direction X. The opening shape of the auxiliary receiving portion of the auxiliary sub-pixel G' is the same as the opening shape of the second receiving portion of the green sub-pixel G, both being quadrilaterals. The aperture ratio ratio of the green sub-pixel G to the auxiliary sub-pixel G' ranges from 0.5 to 1.0. The length of the green sub-pixel G in the row direction X is g1, for example, g1 ≥ 50 nm.

[0074] The minimum distance between the first accommodating portion in the pixel unit 100 located in the i-th row and j-th column, the second accommodating portion in the pixel unit 100 located in the i-th row and j-th column, and the second accommodating portion in the pixel unit 100 located in the i-th row and j-th column is l3; the minimum distance between the first accommodating portion in the pixel unit 100 located in the (i+1)-th row and j-th column, the second accommodating portion in the pixel unit 100 located in the i-th row and j-th column, and the second accommodating portion in the pixel unit 100 located in the i-th row and j-th column is l4. That is, in FIG3 , the distance between the top edge of the auxiliary sub-pixel G' and the bottom edge of the red sub-pixel R closest to its top edge is l3, and the distance between the bottom edge of the auxiliary sub-pixel G' and the top edge of the red sub-pixel R closest to its bottom edge is l4. For example, 1 / 6*g1≤l3, l4≤1 / 3*g1, where l3 and l4 can be equal or different.

[0075] The distances between the auxiliary sub-pixel G' and the two green sub-pixels G on its two sides are d1 and d2 respectively, and d1 and d2 may be equal or unequal. 1 / 10*g1≤d1, d2≤1 / 5*g1.

[0076] In this example, the auxiliary sub-pixel G' and the green sub-pixel G are controlled to emit light simultaneously, improving the overall brightness and efficiency of the device. To reduce product power consumption, the auxiliary sub-pixel G' can also be controlled to emit light after the green light-emitting device has been emitting light for a certain period of time. For example, the auxiliary sub-pixel G' is controlled to emit light after the brightness of the green sub-pixel G decays to 80% of the initial value, thereby increasing the product life. Moreover, in a dark environment (for example: low grayscale below 64 grayscale), the auxiliary sub-pixel G' can also be lit separately to improve product contrast and reduce product power consumption.

[0077] In this example, the sizes and spacings of the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel can be the same as those in FIG. 1 , and thus will not be described one by one here.

[0078] In some examples, Figure 4 is a cross-sectional view of a display substrate according to an embodiment of the present disclosure. As shown in Figure 4, since an auxiliary sub-pixel G' is disposed between adjacent green sub-pixels G, unlike in Figure 1, in this example, the auxiliary electrode AE ​​is disposed between the red sub-pixel R and the blue sub-pixel B. The auxiliary electrode AE ​​can also be disposed on the same layer as the anode of the light-emitting device. In this case, the auxiliary electrode AE ​​is connected to the first power signal line via a first via hole penetrating the first interlayer insulating layer (comprising the gate insulating layer, interlayer insulating layer, passivation layer, and planarization layer, sequentially disposed in a direction away from the substrate 10). To electrically connect the auxiliary electrode AE ​​to the cathode of the light-emitting device, a second via hole is etched through the pixel defining layer at the corresponding position of the auxiliary electrode AE. Because the first accommodating portion of the red sub-pixel R and the third accommodating portion of the blue sub-pixel B are relatively narrow, forming the first via hole for the auxiliary electrode AE ​​in these locations could cause lateral current leakage between the light-emitting devices of the blue sub-pixel B and the red sub-pixel R during normal operation, leading to crosstalk. Therefore, the hole location needs to be optimized. Preferably, FIG5 is a process flow chart for punching holes in a display substrate to form auxiliary electrodes AE according to an embodiment of the present disclosure. As shown in FIG5 , when preparing the auxiliary electrodes AE, the pixel defining layer is first punched using photolithography or laser technology, and then filled with a low-dielectric-constant dielectric material 20, including inorganic materials such as SiOx, SiNOx, SiNx, porous silica, and organic materials such as polyimide, polynorbornene, benzocyclobutene, and PTFE. Next, punching is performed using photolithography or laser technology to form a first via hole and a second via hole 102. At this point, a protective layer 21 of dielectric constant dielectric is formed on the sidewalls of the second via hole 102. Finally, the auxiliary electrodes AE are formed in the holes. Materials for the auxiliary electrodes AE include aluminum, copper, tungsten, titanium, molybdenum, gold, and the like.

[0079] FIG6 is a partial enlarged view of the position of the auxiliary electrode AE ​​of the display substrate of an embodiment of the present disclosure. As shown in FIG6 , further, to further reduce resistance, an electron conduction layer 30 is formed on the surface of the auxiliary electrode AE ​​facing away from the base substrate 10. The material of the electron conduction layer 30 includes a metal oxide layer, such as ITO, IGO, ITZO, IGZOd, etc. This layer can increase the conductivity of electrons, thereby reducing the resistivity ρ of the film layer, thereby further reducing the product current drop and improving product uniformity. In this case, the number of auxiliary electrodes AE can be reduced, preferably only forming the auxiliary electrode AE ​​between the red sub-pixel R and the blue sub-pixel B located in different pixel units 100. That is, the orthographic projection of the auxiliary electrode AE ​​on the base substrate 10 is located between the orthographic projections of the first and third accommodating portions of two different pixel units 100 on the base substrate 10.

[0080] In some examples, Figure 7a is a partial cross-sectional schematic diagram of the display substrate of the first example of the embodiment of the present disclosure; Figure 7b is a partial cross-sectional schematic diagram of the display substrate of the first example of the embodiment of the present disclosure; as shown in Figures 7a and 7b, the light-emitting device of each sub-pixel emits blue light, a red quantum dot unit 401 is set on the light-emitting surface side of the light-emitting device of the red sub-pixel R, a green quantum dot unit 402 is set on the light-emitting surface side of the light-emitting device of the green sub-pixel G, and an auxiliary quantum dot unit 402' is set on the light-emitting surface side of the light-emitting device of the auxiliary sub-pixel G'.

[0081] In some examples, the quantum dots in the auxiliary quantum dot unit 402' are different from the green quantum dot unit 402. It should be noted that in the embodiments of the present disclosure, the materials of the quantum dot units are considered different if any of the following conditions are met: the types of quantum dots in the quantum dot units are different; the types of quantum dots in the quantum dot units are the same, but the quantum dot distribution density is different; the types of quantum dots in the quantum dot units are the same, but the quantum dot particle size is different, etc.

[0082] In one example, the quantum dot material in auxiliary quantum dot unit 402' may include Cd or a perovskite (Pb) system material, while the quantum dot material in red quantum dot unit 401 and green quantum dot unit 402 may include InP, thereby improving the color gamut and efficiency of the light-emitting device. Of course, the quantum dots in auxiliary quantum dot unit 402' and the quantum dots in green quantum dot unit 402 can be made of the same material, for example, both using Cd or a perovskite (Pb) system material. In this case, the quantum dot particle size and / or density of the two quantum dots must be different.

[0083] The comparison of optical properties of different material systems is shown in Table 1.

[0084] Table 1:

[0085] The aperture ratio of the auxiliary sub-pixel G' is set to: 5% to 10%. Among them, the aperture ratio is adjusted to meet the RoHS requirements for heavy metals. When the quantum dot ink used in the auxiliary quantum dot unit 402' of the auxiliary sub-pixel G' includes Cd quantum dots, the Cd quantum dot content can be set to: 1000ppm≤x≤2000ppm. When the quantum dot ink used in the auxiliary quantum dot unit 402' of the auxiliary sub-pixel G' includes perovskite, the Pb content in the perovskite quantum dots can be set to: 10000ppm≤x≤20000ppm, and the rest can be filled with InP material, and its concentration (solid content) range can be set to: 20-40%. Figure 8a is a spectrum of different quantum dot material systems. As shown in Figure 7, the quantum dots of the Cd, perovskite (Pb) system have a narrower FWHM than those of the InP system, so under the same Peak conditions, their color purity is purer. Figure 8b is the absorption diagram of different quantum dot material systems. As shown in Figure 8, in the blue light band of 430-480nm, the absorption rate of different QD material systems is: Cd>perovskite (Pb)>InP, so its conversion rate also conforms to the above rule.

[0086] Second Example: FIG9 is a top view of a display substrate of a second example of an embodiment of the present disclosure; as shown in FIG9 , this example differs from the first example in that two auxiliary sub-pixels G' are disposed between two adjacent green sub-pixels G in the row direction X, namely a first auxiliary sub-pixel G1' and a second auxiliary sub-pixel G2', and the first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' are disposed side by side in the row direction X. The first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' are of identical size, and their aperture ratio ratio to the green sub-pixel G is in the range of 0.1 to 0.4.

[0087] In some examples, because the first auxiliary subpixel G1' and the second auxiliary subpixel G2' have the same size, the distance between the top edge of the first auxiliary subpixel G1' and the bottom edge of the red subpixel R closest to its top edge is l3, and the distance between the top edge of the second auxiliary subpixel G2' and the bottom edge of the red subpixel R closest to its top edge is also l3. The distance between the bottom edge of the first auxiliary subpixel G1' and the top edge of the red subpixel R closest to its bottom edge is l4, and the distance between the bottom edge of the second auxiliary subpixel G2' and the top edge of the red subpixel R closest to its bottom edge is l4. For example: 1 / 6*g1≤l3, l4≤1 / 3*g1, where l3 and l4 can be equal or different.

[0088] The distance between the first auxiliary sub-pixel G1' and the nearest green sub-pixel G is d1, and the distance between the second auxiliary sub-pixel G2' and the nearest green sub-pixel G is d2. d1 and d2 may be equal or different. 1 / 10*g1≤d1, d2≤1 / 5*g1.

[0089] The distance between the first auxiliary sub-pixel G1 ′ and the second auxiliary sub-pixel G2 ′ is d3 , and 1 / 10*g1≤d3≤1 / 6*g1.

[0090] In some examples, the aperture ratios of the first auxiliary sub-pixel G1 ′ and the second auxiliary sub-pixel G2 ′ may be different, for example, the ratio of the aperture ratios thereof is about 1.5 to 4. In this case, one of the auxiliary sub-pixels may be selected to be lit according to demand, thereby reducing power consumption.

[0091] In this example, the first auxiliary sub-pixel G1' includes a first auxiliary quantum dot unit located on the light-emitting surface of the light-emitting device, and the second auxiliary sub-pixel G2' includes a second auxiliary quantum dot unit located on the light-emitting surface of the light-emitting device. The quantum dot materials in the first and second auxiliary quantum dot units can include Cd or perovskite (Pb) system materials; the quantum dot materials in the first and second auxiliary quantum dot units can be the same or different. The quantum dot materials in the red quantum dot unit 401 and the green quantum dot unit 402 can include InP, which can improve the color gamut and efficiency of the light-emitting device.

[0092] The aperture ratios of the first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' are set to 2% to 5%, and their sizes are identical. To meet RoHS requirements for heavy metals, when the quantum dot ink used in the first and second auxiliary quantum dot units includes Cd quantum dots, the Cd quantum dot content can be set to: 1000ppm≤x≤2500ppm; when the quantum dot ink used in the first and second auxiliary quantum dot units includes perovskite, the Pb content in the perovskite quantum dots can be set to: 10000ppm≤x≤25000ppm, with the remainder filled with InP material, with a concentration (solid content) range of 20% to 40%.

[0093] In this example, since two auxiliary sub-pixels G' are provided between the two green sub-pixels G, while achieving the same effect as the first example, one or both auxiliary sub-pixels G' may be turned on to improve device performance.

[0094] Third Example: FIG10 is a top view of a display substrate of a third example of an embodiment of the present disclosure; as shown in FIG10 , this example is substantially the same as the second example. In this example, two auxiliary sub-pixels G' are also disposed between two adjacent green sub-pixels G in the row direction X. These two auxiliary sub-pixels are a first auxiliary sub-pixel G1' and a second auxiliary sub-pixel G2'. The first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' are disposed side by side in the row direction X. Unlike the second example, the first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' have different sizes. The aperture ratio ratio of the first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' to the green sub-pixel G is in the range of 0.1 to 0.6, but the sizes of the two are inconsistent. In the figure, only the area of ​​the first auxiliary sub-pixel G1' is larger than the area of ​​the second auxiliary sub-pixel G2'. The area ratio of the two is x2, and x2 satisfies: 3 / 2≤x2≤5. The positions of the first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' can be interchanged left and right.

[0095] The distance between the top edge of the first auxiliary subpixel G1' and the bottom edge of the red subpixel R closest to its top edge is l3, and the distance between the top edge of the second auxiliary subpixel G2' and the bottom edge of the red subpixel R closest to its top edge is also l3. The distance between the bottom edge of the first auxiliary subpixel G1' and the top edge of the red subpixel R closest to its bottom edge is l4, and the distance between the bottom edge of the second auxiliary subpixel G2' and the top edge of the red subpixel R closest to its bottom edge is l4. For example: 1 / 6*g1≤l3, l4≤1 / 3*g1, where l3 and l4 can be equal or different.

[0096] The distance between the first auxiliary sub-pixel G1' and the nearest green sub-pixel G is d1, and the distance between the second auxiliary sub-pixel G2' and the nearest green sub-pixel G is d2. d1 and d2 may be equal or different. 1 / 10*g1≤d1, d2≤1 / 5*g1.

[0097] The distance between the first auxiliary sub-pixel G1 ′ and the second auxiliary sub-pixel G2 ′ is d3 , and 1 / 10*g1≤d3≤1 / 6*g1.

[0098] In some examples, the ratio of the aperture ratios of the first auxiliary sub-pixel G1 ′ to the second auxiliary sub-pixel G2 ′ is about 1.5 to 4. In this case, one of the auxiliary sub-pixels can be selected to be lit according to demand, which can reduce power consumption.

[0099] In some examples, the quantum dots in the auxiliary quantum dot unit 402' are different from the green quantum dot unit 402. It should be noted that in the embodiments of the present disclosure, the materials of the quantum dot units are considered different if any of the following conditions are met: the types of quantum dots in the quantum dot units are different; the types of quantum dots in the quantum dot units are the same, but the quantum dot distribution density is different; the types of quantum dots in the quantum dot units are the same, but the quantum dot particle size is different, etc.

[0100] In this example, the first auxiliary subpixel G1' includes a first auxiliary quantum dot unit located on the light-emitting surface of the light-emitting device, and the second auxiliary subpixel G2' includes a second auxiliary quantum dot unit located on the light-emitting surface of the light-emitting device. The quantum dot materials in the first and second auxiliary quantum dot units can include Cd or perovskite (Pb) system materials; the quantum dot materials in the first and second auxiliary quantum dot units can be the same or different. The quantum dot materials in the red and green quantum dot units can include InP, which can improve the color gamut and efficiency of the light-emitting device.

[0101] The aperture ratio of the first auxiliary sub-pixel G1' is set to 6% to 8%, and the aperture ratio of the second auxiliary sub-pixel G1' is set to 2% to 4%. To meet RoHS requirements for heavy metals, when the quantum dot ink used in the first and second auxiliary quantum dot units includes Cd quantum dots, the Cd quantum dot content can be set to 800ppm≤x≤1250ppm; when the quantum dot ink used in the first and second auxiliary quantum dot units includes perovskite, the Pb content in the perovskite quantum dots can be set to 8000ppm≤x≤12500ppm, and the remainder can be filled with InP material, and its concentration (solid content) can be set to 20% to 40%.

[0102] The rest of the structures in this example are the same as those in the above example, so they will not be described again here.

[0103] Fourth Example: FIG11 is a top view of a display substrate according to a fourth example of the present disclosure. As shown in FIG11 , this example is substantially the same as the first example. In this example, two auxiliary sub-pixels G' are disposed between two adjacent green sub-pixels G in the row direction X. These auxiliary sub-pixels are a first auxiliary sub-pixel G1' and a second auxiliary sub-pixel G2'. The first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' are disposed side by side in the column direction Y. The first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' are of identical size, and their aperture ratio ratio to the green sub-pixel G is in the range of 0.1 to 0.4.

[0104] In some examples, the distance between the top edge of the first auxiliary subpixel G1' and the bottom edge of the red subpixel R closest to its top edge is l3, and the distance between the bottom edge of the second auxiliary subpixel G2' and the top edge of the red subpixel R closest to its bottom edge is l4. For example: 1 / 6*g1≤l3, l4≤1 / 3*g1, where l3 and l4 can be equal or different.

[0105] The distance between the first auxiliary sub-pixel G1 ′ and the second auxiliary sub-pixel G2 ′ is l5, and 1 / 10*g1≤l5≤1 / 6*g1.

[0106] Since the first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' have the same length in the row direction X, the spacing between them and the two green sub-pixels G located on either side of them is d1 and d2, respectively. d1 and d2 can be equal or different. Here, 1 / 10*g1≤d1, d2≤1 / 5*g1.

[0107] In some examples, the aperture ratios of the first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' may be different, for example, the ratio of the aperture ratios thereof is about 1.5 to 4. In this case, the auxiliary sub-pixel G' may be selected to be lit according to demand, thereby reducing power consumption.

[0108] In some examples, the quantum dots in the auxiliary quantum dot unit 402' are different from the green quantum dot unit 402. It should be noted that in the embodiments of the present disclosure, the materials of the quantum dot units are considered different if any of the following conditions are met: the types of quantum dots in the quantum dot units are different; the types of quantum dots in the quantum dot units are the same, but the quantum dot distribution density is different; the types of quantum dots in the quantum dot units are the same, but the quantum dot particle size is different, etc.

[0109] In this example, the first auxiliary subpixel G1' includes a first auxiliary quantum dot unit located on the light-emitting surface of the light-emitting device, and the second auxiliary subpixel G2' includes a second auxiliary quantum dot unit located on the light-emitting surface of the light-emitting device. The quantum dot materials in the first and second auxiliary quantum dot units can include Cd or perovskite (Pb) system materials; the quantum dot materials in the first and second auxiliary quantum dot units can be the same or different. The quantum dot materials in the red and green quantum dot units can include InP, which can improve the color gamut and efficiency of the light-emitting device.

[0110] The aperture ratios of the first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' are set to 2% to 5%, and the two are of the same size. To meet RoHS requirements for heavy metals, when the quantum dot ink used in the first and second auxiliary quantum dot units includes Cd quantum dots, the Cd quantum dot content can be set to: 1000ppm≤x≤2000ppm; when the quantum dot ink used in the first and second auxiliary quantum dot units includes perovskite, the Pb content in the perovskite quantum dots can be set to: 10000ppm≤x≤20000ppm, and the remainder can be filled with InP material, with a concentration (solid content) range of 20% to 40%.

[0111] The rest of the structures in this example are the same as those in the above example, so they will not be described again here.

[0112] Fifth Example: FIG12 is a top view of a display substrate according to the fifth example of the present disclosure. As shown in FIG12 , this example is substantially the same as the fourth example. In this example, two auxiliary sub-pixels G' are also disposed between two adjacent green sub-pixels G in the row direction X. These two auxiliary sub-pixels are a first auxiliary sub-pixel G1' and a second auxiliary sub-pixel G2'. The first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' are disposed side by side in the column direction Y. Unlike the fourth example, the first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' have different sizes. The aperture ratio ratio of the first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' to the green sub-pixel G is in the range of 0.1 to 0.6, but their sizes are different. In the figure, only the area of ​​the first auxiliary sub-pixel G1' is larger than the area of ​​the second auxiliary sub-pixel G2'. The area ratio of the two is x3, and x3 satisfies the following: 3 / 2≤x2≤5. The first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' can be interchanged. The aperture ratio ratio of the first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' to the green sub-pixel G is in the range of 0.1 to 0.6, but their sizes are different. In the figure, only the area of ​​the first auxiliary sub-pixel G1' is larger than the area of ​​the second auxiliary sub-pixel G2'. The area ratio of the two is x2, and x2 satisfies the following: 3 / 2≤x2≤5. The first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' can be interchanged.

[0113] In some examples, the distance between the top edge of the first auxiliary subpixel G1' and the bottom edge of the red subpixel R closest to its top edge is l3, and the distance between the bottom edge of the second auxiliary subpixel G2' and the top edge of the red subpixel R closest to its bottom edge is l4. For example: 1 / 6*g1≤l3, l4≤1 / 3*g1, where l3 and l4 can be equal or different.

[0114] The distance between the first auxiliary sub-pixel G1 ′ and the second auxiliary sub-pixel G2 ′ is l5, and 1 / 10*g1≤l5≤1 / 6*g1.

[0115] Since the first auxiliary sub-pixel G1' and the second auxiliary sub-pixel G2' have the same length in the row direction X, the spacing between them and the two green sub-pixels G located on either side of them is d1 and d2, respectively. d1 and d2 can be equal or different. Here, 1 / 10*g1≤d1, d2≤1 / 5*g1.

[0116] In some examples, the ratio of the aperture ratios of the first auxiliary sub-pixel G1 ′ and the second auxiliary sub-pixel G2 ′ is about 1.5 to 4. At this time, one of the auxiliary sub-pixels can be selected to be lit according to demand, which can reduce power consumption.

[0117] In some examples, the quantum dots in the auxiliary quantum dot unit 402' are different from the green quantum dot unit 402. It should be noted that in the embodiments of the present disclosure, the materials of the quantum dot units are considered different if any of the following conditions are met: the types of quantum dots in the quantum dot units are different; the types of quantum dots in the quantum dot units are the same, but the quantum dot distribution density is different; the types of quantum dots in the quantum dot units are the same, but the quantum dot particle size is different, etc.

[0118] In this example, the first auxiliary subpixel G1' includes a first auxiliary quantum dot unit located on the light-emitting surface of the light-emitting device, and the second auxiliary subpixel G2' includes a second auxiliary quantum dot unit located on the light-emitting surface of the light-emitting device. The quantum dot materials in the first and second auxiliary quantum dot units can include Cd or perovskite (Pb) system materials; the quantum dot materials in the first and second auxiliary quantum dot units can be the same or different. The quantum dot materials in the red and green quantum dot units can include InP, which can improve the color gamut and efficiency of the light-emitting device.

[0119] The aperture ratio of the first auxiliary sub-pixel G1' is set to 6% to 8%, and the aperture ratio of the second auxiliary sub-pixel G1' is set to 2% to 4%. To meet RoHS requirements for heavy metals, when the quantum dot ink used in the first and second auxiliary quantum dot units includes Cd quantum dots, the Cd quantum dot content can be set to 800ppm≤x≤1250ppm; when the quantum dot ink used in the first and second auxiliary quantum dot units includes perovskite, the Pb content in the perovskite quantum dots can be set to 8000ppm≤x≤12500ppm, and the remainder can be filled with InP material, and its concentration (solid content) can be set to 20% to 40%.

[0120] The rest of the structures in this example are the same as those in the above example, so they will not be described again here.

[0121] Sixth example: FIG13 is a top view of the display substrate of the sixth example of the embodiment of the present disclosure; as shown in FIG13 , in this example, three auxiliary sub-pixels G' are arranged between two adjacent green sub-pixels G in the row direction X, namely a first auxiliary sub-pixel G1', a second auxiliary sub-pixel G2', and a third auxiliary sub-pixel G3'. The second auxiliary sub-pixel G2' and the third auxiliary sub-pixel G3' are arranged side by side in the column direction Y and side by side with the first auxiliary sub-pixel G1' in the row direction X. The positions of the first auxiliary sub-pixel G1', the second auxiliary sub-pixel G2', and the third auxiliary sub-pixel G3' can be interchanged. The aperture ratio ratio of the first auxiliary sub-pixel G1' to the green sub-pixel G is in the range of 0.1 to 0.4. The aperture ratio ratio of the second auxiliary sub-pixel G2 ′ to the green sub-pixel G and the aperture ratio ratio of the third auxiliary sub-pixel G3 ′ to the green sub-pixel G may be the same, both ranging from 0.1 to 0.4.

[0122] In some examples, the distance between the top edge of the first auxiliary subpixel G1' and the bottom edge of the red subpixel R closest to its top edge is l3, and the distance between the top edge of the second auxiliary subpixel G2' and the bottom edge of the red subpixel R closest to its top edge is also l3. The distance between the bottom edge of the first auxiliary subpixel G1' and the top edge of the red subpixel R closest to its bottom edge is l4, and the distance between the bottom edge of the third auxiliary subpixel G3' and the top edge of the red subpixel R closest to its bottom edge is also l4. For example: 1 / 6*g1≤l3, l4≤1 / 3*g1, where l3 and l4 can be equal or different.

[0123] The distance between the first auxiliary sub-pixel G1' and the nearest green sub-pixel G is d1, and the distance between the second auxiliary sub-pixel G2' and the third auxiliary sub-pixel G3' and the nearest green sub-pixel G is d2. d1 and d2 may be equal or different. 1 / 10*g1≤d1, d2≤1 / 5*g1.

[0124] The distance between the first auxiliary sub-pixel G1 ′ and the second auxiliary sub-pixel G2 ′ is d3 , and the distance between the first auxiliary sub-pixel G1 ′ and the third auxiliary sub-pixel G3 ′ is also d3 , and 1 / 10*g1≤d3≤1 / 6*g1.

[0125] In some examples, the ratio of the aperture ratios of the first auxiliary sub-pixel G1 ′ and the second auxiliary sub-pixel G2 ′ is about 1.5 to 4. At this time, one of the auxiliary sub-pixels can be selected to be lit according to demand, which can reduce power consumption.

[0126] In some examples, the quantum dots in the auxiliary quantum dot unit 402' are different from the green quantum dot unit 402. It should be noted that in the embodiments of the present disclosure, the materials of the quantum dot units are considered different if any of the following conditions are met: the types of quantum dots in the quantum dot units are different; the types of quantum dots in the quantum dot units are the same, but the quantum dot distribution density is different; the types of quantum dots in the quantum dot units are the same, but the quantum dot particle size is different, etc.

[0127] In this example, the first auxiliary sub-pixel G1' includes a first auxiliary quantum dot unit located on the light-emitting surface side of the light-emitting device, the second auxiliary sub-pixel G2' includes a second auxiliary quantum dot unit located on the light-emitting surface side of the light-emitting device, and the third auxiliary sub-pixel G3' includes a second auxiliary quantum dot unit located on the light-emitting surface side of the light-emitting device. The quantum dot materials in the first, second, and third auxiliary quantum dot units may include Cd or perovskite (Pb) system materials; the quantum dot materials in the first, second, and third auxiliary quantum dot units may be the same or different. The quantum dot materials in the red and green quantum dot units may include InP, which can improve the color gamut and efficiency of the light-emitting device.

[0128] The aperture ratio of the first auxiliary sub-pixel G1' is set to 2% to 5%, and the aperture ratio of the second auxiliary sub-pixel G2' and the third auxiliary sub-pixel G' is set to 1% to 4%. The two sizes can be the same or different. To meet RoHS requirements for heavy metals, when the quantum dot ink used in the materials of the first auxiliary quantum dot unit, the second auxiliary quantum dot unit, and the third auxiliary quantum dot unit includes Cd quantum dots, the Cd quantum dot content can be set to: 750ppm≤x≤2500ppm; when the quantum dot ink used in the materials of the first auxiliary quantum dot unit, the second auxiliary quantum dot unit, and the third auxiliary quantum dot unit includes perovskite, the Pb content in the perovskite quantum dots can be set to: 7500ppm≤x≤25000ppm, and the remainder can be filled with InP material, and its concentration (solid content) can be set to: 20% to 40%.

[0129] The rest of the structures in this example are the same as those in the above example, so they will not be described again here.

[0130] Seventh example: FIG14 is a top view of the display substrate of the seventh example of the embodiment of the present disclosure; as shown in FIG14 , in this example, three auxiliary sub-pixels G' are arranged between two adjacent green sub-pixels G in the row direction X, namely the first auxiliary sub-pixel G1', the second auxiliary sub-pixel G2', and the third auxiliary sub-pixel G3'. The second auxiliary sub-pixel G2' and the third auxiliary sub-pixel G3' are arranged side by side in the row direction X and side by side with the first auxiliary sub-pixel G1' in the column direction Y. The positions of the first auxiliary sub-pixel G1', the second auxiliary sub-pixel G2', and the third auxiliary sub-pixel G3' can be interchanged. The aperture ratio ratio of the first auxiliary sub-pixel G1' to the green sub-pixel G is in the range of 0.1 to 0.4. The aperture ratio ratio of the second auxiliary sub-pixel G2 ′ to the green sub-pixel G and the aperture ratio ratio of the third auxiliary sub-pixel G3 ′ to the green sub-pixel G may be the same, both ranging from 0.1 to 0.4.

[0131] In some examples, the distance between the top edge of the first auxiliary subpixel G1' and the bottom edge of the red subpixel R closest to its top edge is l3; the distance between the bottom edge of the second auxiliary subpixel G2' and the top edge of the red subpixel R closest to its bottom edge is l4; and the distance between the bottom edge of the third auxiliary subpixel G3' and the top edge of the red subpixel R closest to its bottom edge is also l4. For example: 1 / 6*g1≤l3, l4≤1 / 3*g1, where l3 and l4 can be equal or different.

[0132] The distance between the first auxiliary sub-pixel G1 ′ and the second auxiliary sub-pixel G2 ′ is l5, and the distance between the first auxiliary sub-pixel G1 ′ and the third auxiliary sub-pixel G3 ′ is also l5, and 1 / 10*g1≤l5≤1 / 6*g1.

[0133] The distances between the first auxiliary subpixel G1' and its two nearest green subpixels G are d1 and d2, respectively. The distances between the second auxiliary subpixel G2' and its nearest green subpixel G are d1, and the distance between the third auxiliary subpixel G3' and its nearest green subpixel G is d2. d1 and d2 may be equal or different. 1 / 10*g1≤d1, d2≤1 / 5*g1.

[0134] In some examples, the ratio of the aperture ratios of the first auxiliary sub-pixel G1 ′ to the second auxiliary sub-pixel G2 ′ is about 1.5 to 4. At this time, the auxiliary sub-pixel G′ can be selected to be lit according to demand, which can reduce power consumption.

[0135] In some examples, the quantum dots in the auxiliary quantum dot unit 402' are different from the green quantum dot unit 402. It should be noted that in the embodiments of the present disclosure, the materials of the quantum dot units are considered different if any of the following conditions are met: the types of quantum dots in the quantum dot units are different; the types of quantum dots in the quantum dot units are the same, but the quantum dot distribution density is different; the types of quantum dots in the quantum dot units are the same, but the quantum dot particle size is different, etc.

[0136] In this example, the first auxiliary sub-pixel G1' includes a first auxiliary quantum dot unit located on the light-emitting surface side of the light-emitting device, the second auxiliary sub-pixel G2' includes a second auxiliary quantum dot unit located on the light-emitting surface side of the light-emitting device, and the third auxiliary sub-pixel G3' includes a second auxiliary quantum dot unit located on the light-emitting surface side of the light-emitting device. The quantum dot materials in the first, second, and third auxiliary quantum dot units may include Cd or perovskite (Pb) system materials; the quantum dot materials in the first, second, and third auxiliary quantum dot units may be the same or different. The quantum dot materials in the red and green quantum dot units may include InP, which can improve the color gamut and efficiency of the light-emitting device.

[0137] The aperture ratio of the first auxiliary sub-pixel G1' is set to 2% to 5%, and the aperture ratio of the second auxiliary sub-pixel G2' and the third auxiliary sub-pixel G' is set to 1% to 4%. The two sizes can be the same or different. To meet RoHS requirements for heavy metals, when the quantum dot ink used in the materials of the first auxiliary quantum dot unit, the second auxiliary quantum dot unit, and the third auxiliary quantum dot unit includes Cd quantum dots, the Cd quantum dot content can be set to: 750ppm≤x≤2500ppm; when the quantum dot ink used in the materials of the first auxiliary quantum dot unit, the second auxiliary quantum dot unit, and the third auxiliary quantum dot unit includes perovskite, the Pb content in the perovskite quantum dots can be set to: 7500ppm≤x≤25000ppm, and the remainder can be filled with InP material, and its concentration (solid content) can be set to: 20% to 40%.

[0138] The rest of the structures in this example are the same as those in the above example, so they will not be described again here.

[0139] Example 8: FIG15 is a top view of the display substrate of the eighth example of the embodiment of the present disclosure. As shown in FIG15 , in this example, four auxiliary sub-pixels G' are arranged in an array between two adjacent green sub-pixels G in the row direction X, namely the first auxiliary sub-pixel G1', the second auxiliary sub-pixel G2', the third auxiliary sub-pixel G3', and the fourth auxiliary sub-pixel G4'. The aperture ratio ratio of the first auxiliary sub-pixel G1', the second auxiliary sub-pixel G2', the third auxiliary sub-pixel G3', and the fourth auxiliary sub-pixel G4' to the green sub-pixel G can be the same, and the range is 0.05 to 0.2. The figure takes the example of the first auxiliary sub-pixel G1', the second auxiliary sub-pixel G2', the third auxiliary sub-pixel G3', and the fourth auxiliary sub-pixel G4' having the same aperture size as the green sub-pixel G.

[0140] In some examples, the distance between the top edge of the first auxiliary subpixel G1' and the bottom edge of the red subpixel R closest to its top edge is l3, the distance between the top edge of the second auxiliary subpixel G2' and the bottom edge of the red subpixel R closest to its top edge is also l3, the distance between the bottom edge of the third auxiliary subpixel G3' and the top edge of the red subpixel R closest to its bottom edge is l4, and the distance between the bottom edge of the fourth auxiliary subpixel G4' and the top edge of the red subpixel R closest to its bottom edge is also l4. For example: 1 / 6*g1≤l3, l4≤1 / 3*g1, where l3 and l4 can be equal or different.

[0141] The distance between the first auxiliary subpixel G1' and its nearest green subpixel G is d1, the distance between the second auxiliary subpixel G2' and its nearest green subpixel G is d2, the distance between the third auxiliary subpixel G3' and its nearest green subpixel G is d1, and the distance between the fourth auxiliary subpixel G4' and its nearest green subpixel G is d2. d1 and d2 may be equal or different. 1 / 10*g1≤d1, d2≤1 / 5*g1.

[0142] The distance between the first auxiliary sub-pixel G1 ′ and the second auxiliary sub-pixel G2 ′ is d3 , the distance between the third auxiliary sub-pixel G3 ′ and the fourth auxiliary sub-pixel G4 ′ is also d3 , and 1 / 10*g1≤d3≤1 / 6*g1.

[0143] The distance between the first auxiliary sub-pixel G1 ′ and the third auxiliary sub-pixel G3 ′ is l5, and the distance between the second auxiliary sub-pixel G2 ′ and the fourth auxiliary sub-pixel G4 ′ is also l5, and 1 / 10*g1≤l5≤1 / 6*g1.

[0144] In some examples, at least two of the first auxiliary sub-pixel G1', the second auxiliary sub-pixel G2', the third auxiliary sub-pixel G3', and the fourth auxiliary sub-pixel G4' have different aperture ratios, where the ratio of the aperture ratio of the one with the largest aperture ratio to the one with the smallest aperture ratio is approximately 1.5 to 4. In this case, the auxiliary sub-pixel G' can be selected to be illuminated as needed, thereby reducing power consumption.

[0145] In some examples, the quantum dots in the auxiliary quantum dot unit 402' are different from the green quantum dot unit 402. It should be noted that in the embodiments of the present disclosure, the materials of the quantum dot units are considered different if any of the following conditions are met: the types of quantum dots in the quantum dot units are different; the types of quantum dots in the quantum dot units are the same, but the quantum dot distribution density is different; the types of quantum dots in the quantum dot units are the same, but the quantum dot particle size is different, etc.

[0146] In this example, the first auxiliary sub-pixel G1' includes a first auxiliary quantum dot unit located on the light-emitting surface side of the light-emitting device, the second auxiliary sub-pixel G2' includes a second auxiliary quantum dot unit located on the light-emitting surface side of the light-emitting device, the third auxiliary sub-pixel G3' includes a second auxiliary quantum dot unit located on the light-emitting surface side of the light-emitting device, and the fourth auxiliary sub-pixel G4' includes a second auxiliary quantum dot unit located on the light-emitting surface side of the light-emitting device. The quantum dot materials in the first auxiliary quantum dot unit, the second auxiliary quantum dot unit, the third auxiliary quantum dot unit, and the fourth auxiliary quantum dot unit may include Cd or perovskite (Pb) system materials; the quantum dot materials in the first auxiliary quantum dot unit, the second auxiliary quantum dot unit, the third auxiliary quantum dot unit, and the fourth auxiliary quantum dot unit may be the same or different. The quantum dot materials in the red quantum dot unit and the green quantum dot unit may include InP, thereby improving the color gamut and efficiency of the light-emitting device.

[0147] The aperture ratios of the first, second, third, and fourth auxiliary sub-pixels G1', G2', G3', and G4' are set to 1% to 4%, and the sizes of the four sub-pixels can be consistent or inconsistent. To meet RoHS requirements for heavy metals, when the quantum dot ink used in the first, second, third, and fourth auxiliary quantum dot units includes Cd quantum dots, the Cd quantum dot content can be set to 600ppm≤x≤2500ppm. When the quantum dot ink used in the first, second, third, and fourth auxiliary quantum dot units includes perovskite, the Pb content in the perovskite quantum dots can be set to 6000ppm≤x≤25000ppm. The remainder can be filled with InP material, and its concentration (solid content) can be set to 20% to 40%.

[0148] The rest of the structures in this example are the same as those in the above example, so they will not be described again here.

[0149] An embodiment of the present disclosure further provides a display device, which includes any one of the above-mentioned display substrates.

[0150] It will be understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art will appreciate that various modifications and improvements can be made without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A display substrate, comprising: substrate; Pixel units arranged in an array are provided on the base substrate; The pixel unit includes a first sub-pixel, a second sub-pixel, and a third sub-pixel that respectively emit light of different colors, the first sub-pixel and the third sub-pixel are located in the same row, and are located in a different row from the second sub-pixel; wherein, At least one auxiliary sub-pixel is arranged between the second sub-pixels of the pixel units located in the same row, and the auxiliary sub-pixel and the second sub-pixel emit light of the same color.

2. The display substrate according to claim 1, wherein It also includes a driving circuit layer located on the side of the base substrate where the light-emitting device is located, and the driving circuit layer includes a first power signal line, and the first power signal line is electrically connected to the second electrode of the light-emitting device through an auxiliary electrode, and the orthographic projection of the auxiliary electrode on the base substrate is located between the orthographic projections of the light-emitting device of the first sub-pixel and the light-emitting device of the third sub-pixel arranged adjacent to each other in the row direction on the base substrate.

3. The display substrate according to claim 2, wherein: A first interlayer insulating layer is provided between the driving circuit layer and the layer where the first electrode of the light emitting device is located, and a pixel defining layer is provided on a layer of the first electrode of the light emitting device away from the base substrate; The auxiliary electrode is arranged in the same layer as the first electrode of the light-emitting device, and is connected to the first power signal line through a first via hole penetrating the first interlayer insulating layer; the pixel defining layer has a first through hole corresponding to the position of the auxiliary electrode and penetrating along its thickness direction; the side wall of the first through hole is covered with a protective layer.

4. The display substrate according to claim 2, wherein: An electron conducting layer is provided on the surface of the auxiliary electrode facing away from the base substrate.

5. The display substrate according to claim 4, wherein: The orthographic projections on the base substrate are located on both sides of the orthographic projections of the auxiliary electrode on the base substrate, and the first sub-pixel and the third sub-pixel are respectively located in two different pixel units. The display substrate according to claim 1 , wherein: The display substrate further includes a pixel defining layer provided on the first electrode of the light emitting device facing away from the base substrate, the pixel defining layer having a first accommodating portion, a second accommodating portion, a third accommodating portion and an auxiliary accommodating portion penetrating along a thickness direction thereof; The light-emitting layer of the light-emitting device in the first sub-pixel covers the first accommodation portion, the light-emitting layer of the light-emitting device in the second sub-pixel covers the second accommodation portion, the light-emitting layer of the light-emitting device in the third sub-pixel covers the third accommodation portion, and the light-emitting layer of the light-emitting device in the auxiliary sub-pixel covers the auxiliary accommodation portion; The length of the second accommodation portion in the row direction is g1; The minimum distance between the auxiliary accommodating portions, the first accommodating portion in the pixel unit located at the i-th row and j-th column, the second accommodating portion in the pixel unit located at the i-th row and j-th column, and the second accommodating portion in the pixel unit located at the i-th row and (j+1)-th column, is l3; The minimum distance between the auxiliary accommodating portions, the first accommodating portion in the pixel unit located at the (i+1)th row and jth column, the second accommodating portion in the pixel unit located at the i-th row and jth column, and the second accommodating portion in the pixel unit located at the i-th row and (j+1)th column, is l4; i and j are both positive integers; l3≥1 / 6*g1,l4≤1 / 3*g1.

7. The display substrate according to claim 1, wherein: The display substrate further includes a pixel defining layer provided on the first electrode of the light emitting device facing away from the base substrate, the pixel defining layer having a first accommodating portion, a second accommodating portion, a third accommodating portion and an auxiliary accommodating portion penetrating along a thickness direction thereof; The light-emitting layer of the light-emitting device in the first sub-pixel covers the first accommodation portion, the light-emitting layer of the light-emitting device in the second sub-pixel covers the second accommodation portion, the light-emitting layer of the light-emitting device in the third sub-pixel covers the third accommodation portion, and the light-emitting layer of the light-emitting device in the auxiliary sub-pixel covers the auxiliary accommodation portion; The length of the second accommodation portion in the row direction is g1; A plurality of the auxiliary accommodating portions are arranged between adjacent second accommodating portions, at least some of the plurality of the auxiliary accommodating portions are arranged side by side along the column direction, and the spacing between the auxiliary accommodating portions arranged side by side along the column direction is l5, 1 / 10*g1≤l5≤1 / 6*g1.

8. The display substrate according to claim 1, wherein: The display substrate further includes a pixel defining layer provided on the first electrode of the light emitting device facing away from the base substrate, the pixel defining layer having a first accommodating portion, a second accommodating portion, a third accommodating portion and an auxiliary accommodating portion penetrating along a thickness direction thereof; The light-emitting layer of the light-emitting device in the first sub-pixel covers the first accommodation portion, the light-emitting layer of the light-emitting device in the second sub-pixel covers the second accommodation portion, the light-emitting layer of the light-emitting device in the third sub-pixel covers the third accommodation portion, and the light-emitting layer of the light-emitting device in the auxiliary sub-pixel covers the auxiliary accommodation portion; The length of the second accommodation portion in the row direction is g1; For two second-accommodation portions arranged adjacent to each other in the row direction, and each auxiliary accommodation portion located between the two, the minimum distance between one of the second-accommodation portions and the auxiliary accommodation portion is d1, and the minimum distance between the other second-accommodation portion and the auxiliary accommodation portion is d2, d1≥1 / 10*g1, d2≤1 / 5*g1.

9. The display substrate according to claim 1, wherein: The display substrate further includes a pixel defining layer provided on the first electrode of the light emitting device facing away from the base substrate, the pixel defining layer having a first accommodating portion, a second accommodating portion, a third accommodating portion and an auxiliary accommodating portion penetrating along a thickness direction thereof; The light-emitting layer of the light-emitting device in the first sub-pixel covers the first accommodation portion, the light-emitting layer of the light-emitting device in the second sub-pixel covers the second accommodation portion, the light-emitting layer of the light-emitting device in the third sub-pixel covers the third accommodation portion, and the light-emitting layer of the light-emitting device in the auxiliary sub-pixel covers the auxiliary accommodation portion; The length of the second accommodation portion in the row direction is g1; A plurality of the auxiliary accommodating parts are arranged between adjacent second accommodating parts, at least some of the plurality of the auxiliary accommodating parts are arranged side by side along the row direction, and the spacing between the auxiliary accommodating parts arranged side by side along the row direction is d3, 1 / 10*g1≤d3≤1 / 6*g1.

10. The display substrate according to claim 1, wherein Only one auxiliary sub-pixel is provided between the second sub-pixels adjacent to each other in the row direction, and an aperture ratio ratio of the auxiliary sub-pixel to the second sub-pixel is 0.5-10.

11. The display substrate according to claim 1, wherein: A plurality of the auxiliary sub-pixels are arranged side by side along the row direction between the second sub-pixels adjacent to each other in the row direction, and an aperture ratio ratio of the auxiliary sub-pixels to the second sub-pixels is 0.1 to 0.

6.

12. The display substrate according to claim 1, wherein A plurality of the auxiliary sub-pixels are arranged side by side in the column direction between the second sub-pixels adjacent to each other in the row direction, and an aperture ratio ratio of the auxiliary sub-pixels to the second sub-pixels is 0.1 to 0.

6.

13. The display substrate according to claim 1, wherein A plurality of auxiliary sub-pixels are arranged between the second sub-pixels adjacent to each other in the row direction, and some of the auxiliary sub-pixels are arranged side by side along the row direction, and some are arranged side by side along the column direction; an aperture ratio ratio of the auxiliary sub-pixels to the second sub-pixels is 0.05 to 0.

4.

14. The display substrate according to claim 1, wherein There are a plurality of auxiliary sub-pixels between the second sub-pixels adjacent to each other in the row direction, and at least some of the auxiliary sub-pixels have different aperture ratios.

15. The display substrate according to claim 14, wherein: Among the plurality of the auxiliary sub-pixels between the second sub-pixels adjacently arranged in the row direction, a ratio of the one with the largest aperture ratio to the one with the smallest aperture ratio is 1.5-4.

16. The display substrate according to any one of claims 1 to 15, wherein: The first sub-pixel, the second sub-pixel, the third sub-pixel and the auxiliary sub-pixel all include a light-emitting device that emits light of a third color; the first sub-pixel also includes a first quantum dot unit located on the light-emitting surface side of the light-emitting device, the second sub-pixel also includes a second quantum dot unit located on the light-emitting surface side of the light-emitting device, and the auxiliary sub-pixel also includes an auxiliary quantum dot unit located on the light-emitting surface side of the light-emitting device; The first quantum dot unit is configured to emit first color light under the excitation of third color light, and the second quantum dot unit and the auxiliary quantum dot unit are both configured to emit second color light under the excitation of third color light.

17. The display substrate according to claim 16, wherein: The material of the auxiliary quantum dot unit is different from the material of the second quantum dot unit.

18. The display substrate according to claim 17, wherein: The material of the auxiliary quantum unit and the material of the second auxiliary quantum dot unit contain quantum dots of the same type but with different distribution densities; and / or the material of the auxiliary quantum unit and the material of the second auxiliary quantum dot unit contain quantum dots of the same type but with different particle sizes.

19. The display substrate according to claim 18, wherein: The material of the auxiliary quantum unit and the material of the second auxiliary quantum dot unit contain quantum dots of different types.

20. A display device comprising the display substrate according to any one of claims 1 to 19.

Images